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<p>Reports type errors in function call expressions, targets, and return values. In a dynamically typed language, this is possible in a limited number of cases. </p>
<p>Types of function parameters can be specified in
  docstrings or in Python 3 function annotations.</p>
<p><b>Example:</b></p>
<pre><code>
def foo() -> int:
    return "abc" # Expected int, got str


a: str
a = foo() # Expected str, got int
</code></pre>
<p>With the quick-fix, you can modify the problematic types:</p>
<pre><code>
def foo() -> str:
    return "abc"


a: str
a = foo()
</code></pre>
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